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Earlier in the night, Rockwell and Bibb, who have been together for a decade, gave E! News some saucy tips on how to make their relationship last.

"Communication," Rockwell said to E! News' Giuliana Rancic on the red carpet .

"Good sex," Bibb added.

"Communication and good sex," Rockwell said, laughing.

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The category's other nominees were Steve Carell for his role as Bobby Riggs in Battle of the Sexes, Willem Dafoe as Bobby Hicks in The Florida Project, Woody Harrelson as Sheriff Bill Willoughby in Three Billboards Outside Ebbing, Missouri andRichard Jenkins as Giles in The Shape of Water.

Historically, the SAG Awards often predict the eventual Oscar nominees.

Last year, Mahershala Ali took home the SAG Award for Outstanding Performance by a Male Actor in a Supporting Role in a Motion Picture for his role in Moonlight. Ali then went on to win the Oscar in the same category.

Earlier this month, Rockwell won the Golden Globe for Best Supporting Actor in a Motion Picture.

In December, Kristen Bell was announced as the show's first-ever host.

"I am honored to be part of the SAG Awards, and am a little nervous about being its first-ever host. I'm so glad that I'll be in the company of my fellow actors, many of whom I've worked with before, so I know they'll be warm and supportive," the actress told E! News when the news was announced. "It's going to be an amazing night."

SAG-AFTRA represents more than 160,000 professionals in the entertainment industry.